Orpiment( 雌黄): As2S3 WARNING! CONTAINS ARSENIC. Please read the MSDS for cautionary statements.Orpiment is yellow arsenic sulfide, usually described as a lemon or canary yellow or sometimes as a golden or brownish yellow. It is designated as brilliant yellow in Munsell notation 4.4Y 8.7/8.9. Our orpiment is made from natural mineral sources near Kadamdzhay in Kyrgyzstan and is an intensely bright pigment of crystalline particles.Orpiment is also known as "King's Yellow", "Chinese Yellow" and "Yellow OrpimentToxicity: The toxicity of arsenic sulfide pigments has been known for years. Extreme caution must be used when handling the dry orpiment pigment, as well as in any soluble form, to avoid inhaling the dust or ingesting it.